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AN-42031 / Multiple Output Design Considerations for the ML4863:  Fairchild Application Notes

AN-42036 / PCB Grounding System and FAN2001/FAN2011 High Performance DC-DC Converters:  Fairchild Application Notes

Analog Switch Applications in a MultiMode Cell Phone:  Pericom Semiconductor Application Brief # 028

Basic Flashlamp Illumination Circuitry for Cellular Telephones/Cameras:  DN345 -  Design Notes (Linear Technology)

Boost Regulators for Battery Powered Applications / AN-42033:  Fairchild Application Notes /

Cell-Phone-Controlled Audio/Video Mute Switch:  (Electronic Circuit / Schematic)

Cellular Phone calling Detector:  Flashes a LED when detecting an incoming call.  Powered by one 1.5V cell

Cellular Phone Helper #2

Circuitry for Cellular Telephone/Camera Flash Illumination:  AN95 - Linear Technology - This publication concerns implementation of high quality "Flash" illumination in cellular telephones/cameras. Performance vs LED based illumination is discussed and flashlamp operation reviewed. Considerations for support circuitry are given, and a practical circuit, accompanied by performance data, is described. Layout and RFI issues are treated and a sample layout provided. An appended section details operation of the LT3468 flash capacitor charger used in the text's circuit and lists appropriate magnetic components.

Cordless Phone Backup
Do It Yourself Portable Cell Phone Charger - It seems that as cell phones become more sophisticated, their operating times become shorter and shorter.  If you are on the go all the time and have difficultly finding AC or DC outlets to charge your phone, you might consider this simple scheme....(designed by Dave Johnson, P.E.)

DualVoltage Supply Powers SIM Card:  01/20/00 EDN-Design Ideas

FM Wireless Mike:  low power frequency modulated transmitter using two transistors. The circuit works with 9v power supply.

Gel Cell Charger:

GellCell Battery Charger:  circuit to charge a Gell Cell or other lead-acid type battery, includes sense circuit

Micro Spy with FETs:  (Electronic Schematic)

Micro Spy with TTL:  (Electronic Schematic)

Micro Spy with USW:  (Electronic Schematic)

Miniature FM Transmitter #1:  (Electronic Schematic)

Miniature FM Transmitter #2:  (Electronic Schematic)

Miniature FM Transmitter #3:  (Electronic Schematic)

Miniature FM Transmitter #4:  (add 9/04)

Miniature FM Transmitter:  (Electronic circuit)

Miniature FM Transmitters #5

Miniature MW Transmitter:  circuit diagram of simple medium wave transmitter using BF494B. This simple transmitter have a range of 200 meters.

Mobile Cellphone Charger:  (Electronic Circuit)

Mobile Solutions (MP3 Cell phone PDA PMP):  Pericom Semiconductor Application Brief # 046

PCB Grounding System and FAN2001/FAN2011 High Performance DC-DC Converters / AN-42036:  Fairchild Application Notes

PCS: not just another cell phone:  11/21/96 EDN-Design Feature Building Thanks to the availability of low-cost digital chip sets, PCS is now becoming affordable and finding use in fax, e-mail, and palmtop computer functions. Capitalizing on that affordability, PCS providers and IC makers are hoping to lure consumers with imaginative and user friendly features: large, easy-to-read displays; ergonomic touchscreens; and speech recognition.—Stephen Kempainen, Technical Editor

Simple Circuitry for Cellular Telephone/Camera Flash Illumination:  AN95 - Linear Technology - This publication concerns implementation of high quality "Flash" illumination in cellular telephones/cameras. Performance vs LED based illumination is discussed and flashlamp operation reviewed. Considerations for support circuitry are given, and a practical circuit, accompanied by performance data, is described. Layout and RFI issues are treated and a sample layout provided. An appended section details operation of the LT3468 flash capacitor charger used in the text's circuit and lists appropriate magnetic components.

Single NiCd Cell Drives OpAmp:  12/05/96 EDN-Design Ideas

Tiny Efficient High Power LED Camera Flash Solutions for Cell Phone Applications:  Linear Technology Design Note 1009

Wireless Microphone #4

 
 
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